<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- /课程列表 开始 -->
    <section class="container">
      <header class="comm-title">
        <h2 class="fl tac">
          <span class="c-333">全部课程</span>
        </h2>
      </header>
      <section class="c-sort-box">
        <section class="c-s-dl">
          <dl>
            <dt>
              <span class="c-999 fsize14">课程类别</span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li>
                  <a title="全部" href="#" @click="searchOne('')">全部</a>
                </li>
                
                <li v-for="(item,index) in subjectNestedList" v-bind:key="index" :class="{active:oneIndex==index}">
                  <a :title="item.title" href="javascript:void(0);" @click="searchOne(item.id, index)">{{item.title}}</a>
                </li>
              
              </ul>
            </dd>
          </dl>
          <dl>
            <dt>
              <span class="c-999 fsize14"></span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">

                <li v-for="(item,index) in subSubjectList" v-bind:key="index" :class="{active:twoIndex==index}">
                  <a :title="item.title" href="javascript:void(0);" @click="searchTwo(item.id, index)">{{item.title}}</a>
                </li>
                 
              </ul>
            </dd>
          </dl>
          <div class="clear"></div>
        </section>
        <div class="js-wrap">
          <section class="fr">
            <span class="c-ccc">
              <i class="c-master f-fM">1</i>/
              <i class="c-666 f-fM">1</i>
            </span>
          </section>
          <section class="fl">
             <ol class="js-tap clearfix">
<li :class="{'current bg-orange':buyCountSort!=''}">
<a title="销量" href="javascript:void(0);" @click="searchBuyCount()">销量
<span :class="{hide:buyCountSort==''}">↓</span>
</a>
</li>
<li :class="{'current bg-orange':gmtCreateSort!=''}">
<a title="最新" href="javascript:void(0);" @click="searchGmtCreate()">最新
<span :class="{hide:gmtCreateSort==''}">↓</span>
</a>
</li>
<li :class="{'current bg-orange':priceSort!=''}">
<a title="价格" href="javascript:void(0);" @click="searchPrice()">价格&nbsp;
<span :class="{hide:priceSort==''}">↓</span>
</a>
</li>
</ol>
          </section>
        </div>
        <div class="mt40">
          <!-- /无数据提示 开始-->
          <section class="no-data-wrap" v-if="data.total==0">
              <em class="icon30 no-data-ico">&nbsp;</em>
              <span class="c-666 fsize14 ml10 vam">没有相关数据，小编正在努力整理中...</span>
          </section>
          <!-- /无数据提示 结束-->
          <article class="comm-course-list" v-if="data.total>0">
              <ul class="of" id="bna">
                  <li  v-for="item in data.items" v-bind:key="item.id">
                      <div class="cc-l-wrap">
                          <section class="course-img">
                              <img :src="item.cover" class="img-responsive" alt="听力口语">
                              <div class="cc-mask">
                                  <a :href="'/course/'+item.id" title="开始学习" class="comm-btn c-btn-1">开始学习</a>
                              </div>
                          </section>
                          <h3 class="hLh30 txtOf mt10">
                              <a :href="'/course/'+item.id" :title="item.name" class="course-title fsize18 c-333">{{item.name}}</a>
                          </h3>
                          <section class="mt10 hLh20 of">
                              <span class="fr jgTag bg-green" v-if="Number(item.price) ===0" >
                                  <i class="c-fff fsize12 f-fA">免费</i>
                              </span>
                              <span class="fl jgAttr c-ccc f-fA">
                                  <i class="c-999 f-fA">{{item.buyCount}}人学习</i>
                                  |
                                  <i class="c-999 f-fA">{{item.viewCount}}评论</i>
                              </span>
                          </section>
                      </div>
                  </li>
              </ul>
              <div class="clear"></div>
          </article>
      </div>
        <!-- 公共分页 开始 -->
        <div>
            <div class="paging">
                <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
                <a :class="{undisable: !data.hasPrevious}" 
                  @click.prevent="gotoPage(1)" href="#" title="首页">首</a>
                <a :class="{undisable: !data.hasPrevious}"
                  @click.prevent="gotoPage(data.current-1)" href="#" title="前一页">&lt;</a>
                <a v-for="page in data.pages" v-bind:key="page" 
                  :class="{current: data.current == page, undisable: data.current == page}" 
                  @click.prevent="gotoPage(page)" href="#" :title="'第'+page+'页'">{{page}}</a>
                <a :class="{undisable: !data.hasNext}" 
                  @click.prevent="gotoPage(data.current+1)" href="#" title="后一页">&gt;</a>
                <a :class="{undisable: !data.hasNext}" 
                  @click.prevent="gotoPage(data.pages)" href="#" title="末页">末</a>
                <div class="clear"></div>
            </div>
        </div>
        <!-- 公共分页 结束 -->
      </section>
    </section>
    <!-- /课程列表 结束 -->
  </div>
</template>
<script>
import course from "@/api/course"
export default {

  data () {
return {
      page:1,
      data:{},
      subjectNestedList: [], // 一级分类列表
      subSubjectList: [], // 二级分类列表
      searchObj: {}, // 查询表单对象
      oneIndex:-1,
      twoIndex:-1,
      buyCountSort:"",
      gmtCreateSort:"",
      priceSort:""
    }
 },

 //加载完渲染时
created () {
//获取课程列表
this.initCourse()
//获取分类
this.initSubject()
 
},



  methods: {

    
  // asyncData({ params, error }) {
  //   return course.getPageList(1, 8,this.searchObj).then(response => {
  //     console.log(response);
  //     return { data: response.data.data }
  //   })
  // },
    // gotoPage(page){
    //     course.getPageList(page, 8).then(response => {
    //         this.data = response.data.data
    //     })
    // }

//查询课程列表
initCourse(){
    course.getPageList(1,8,this.searchObj).then(response =>{
      console.log(response)
      this.data = response.data.data
      //console.log(this.data)
      //this.data=response
      //console.log(data)
    })
},

//查询所有一级分类
initSubject(){
  course.getNestedTreeList2().then(response =>{
   // console.log(response)
      this.subjectNestedList =response.data.data.tree
    //  console.log(subjectNestedList)
  })

},




//分页切换方法!!!
gotoPage(page) {
  this.page = page
    course.getPageList(page, 8, this.searchObj).then(response => {
      this.data = response.data.data
  })
 },

//----------------------------------------------------------------------------------------------------
//点击一级分类，显示对应的二级分类，查询数据
searchOne(subjectParentId, index) {
//debugger
this.oneIndex = index
this.twoIndex = -1
this.searchObj.subjectId = "";
this.subSubjectList = [];
this.searchObj.subjectParentId = subjectParentId;
this.gotoPage(this.page)
//拿着点击一级分类id 和 所有一级分类 id 进行比较!
//如果id相同 ， 从一级分类
for (let i = 0; i < this.subjectNestedList.length; i++) {
if (this.subjectNestedList[i].id === subjectParentId) {
this.subSubjectList = this.subjectNestedList[i].children
 }
 }
 },



 //点击二级分类，查询数据
searchTwo(subjectId, index) {
this.twoIndex = index
this.searchObj.subjectId = subjectId;
this.gotoPage(this.page)
 },




 //购买量查询
searchBuyCount() {
this.buyCountSort = "1";
this.gmtCreateSort = "";
this.priceSort = "";
this.searchObj.buyCountSort = this.buyCountSort;
this.searchObj.gmtCreateSort = this.gmtCreateSort;
this.searchObj.priceSort = this.priceSort;
this.gotoPage(this.page)
 },
//更新时间查询
searchGmtCreate() {
//debugger
this.buyCountSort = "";
this.gmtCreateSort = "1";
this.priceSort = "";
this.searchObj.buyCountSort = this.buyCountSort;
this.searchObj.gmtCreateSort = this.gmtCreateSort;
this.searchObj.priceSort = this.priceSort;
this.gotoPage(this.page)
 },
//价格查询
searchPrice() {
this.buyCountSort = "";
this.gmtCreateSort = "";
this.priceSort = "1";
this.searchObj.buyCountSort = this.buyCountSort;
this.searchObj.gmtCreateSort = this.gmtCreateSort;
this.searchObj.priceSort = this.priceSort;
this.gotoPage(this.page)
 },



  }
}
</script>

<style scoped>
.active {
background: #bdbdbd;
}
.hide {
display: none;
 }
.show {
display: block;
 }
</style>